Atomic Number
45
Rhodium is a chemical element with symbol Rh and atomic number 45. It is a rare, silvery-white, hard, corrosion-resistant, and chemically inert transition metal.
45
102.91 u
transition metal
solid
12.41 g/cm³
2, 8, 18, 16, 1
Protons: 45 • Electrons: 45 • Neutrons: Varies by isotope
Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹ 4d⁸
1803 • William Hyde Wollaston